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Stonefly Genus Hesperoperla (Golden Stones)

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» Genus Hesperoperla (Golden Stones)
Species in HesperoperlaNumber of SpecimensNumber of Pictures
Hesperoperla pacificaGolden Stone33

1 species isn't included.
Common Names
Pictures Below
The important western genus Hesperoperla currently has only two species. See the species hatch pages for details.

Pictures of 3 Stonefly Specimens in the Genus Hesperoperla:

Female Hesperoperla pacifica (Golden Stone) Stonefly AdultFemale Hesperoperla pacifica (Golden Stone) Stonefly Adult View 1 PicturesFly fishermen refer to this stonefly as one of "golden stones".
Collected November 30, 1999 from the Grande Rhonde River in Washington
Added to by Bnewell on June 26, 2011
Hesperoperla pacifica (Golden Stone) Stonefly NymphHesperoperla pacifica (Golden Stone) Stonefly Nymph View 1 PicturesThis monster started to feed within a few minutes of sharing the inspection tray with its victims. This nymph is a voracious predator of small invertebrates and has even been noted for feeding on small fish and salmonid alevins. The niche it fills in fast water is equivalent to the Dragonfly nymphs that inhabit slower water.

Hesperoperla pacifica nymphs are easily distinguished from other western perlids by the presence of anal gills (obfuscated by algae in the tray) in combination with an hour glass shaped pale mark on the front of their heads.
Collected March 22, 2013 from the Lower Yuba River in CA
Added to by Entoman on April 4, 2013

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